<template>
  <div>
    <div class="cart">
      <h4>全部商品</h4>
      <div class="cart-main">
        <div class="cart-th">
          <div class="cart-th1">全部</div>
          <div class="cart-th2">商品</div>
          <div class="cart-th3">单价(元)</div>
          <div class="cart-th4">数量</div>
          <div class="cart-th5">小计（元）</div>
          <div class="cart-th6">操作</div>
        </div>
        <div class="cart-body">
          <ul
            class="cart-list"
            v-for="cartInfo in shopCartList"
            :key="cartInfo.id"
          >
            <li class="cart-list-con1">
              <input
                type="checkbox"
                name="chk_list"
                :checked="!!cartInfo.isChecked"
                @change="updateCart(cartInfo)"
              />
            </li>
            <li class="cart-list-con2">
              <img :src="cartInfo.imgUrl" />
              <div class="item-msg">
                {{ cartInfo.skuName }}
              </div>
            </li>
            <li class="cart-list-con4">
              <span class="price">{{ cartInfo.skuPrice }}.00</span>
            </li>
            <li class="cart-list-con5">
              <a
                href="javascript:void(0)"
                class="mins"
                @click="commodityNum('remove', cartInfo)"
                >-</a
              >
              <input
                autocomplete="off"
                type="text"
                :value="cartInfo.skuNum"
                minnum="1"
                class="itxt"
                @change="commodityNum('change', cartInfo, $event)"
              />
              <a
                href="javascript:void(0)"
                class="plus"
                @click="commodityNum('add', cartInfo)"
                >+</a
              >
            </li>
            <li class="cart-list-con6">
              <span class="sum">{{ cartInfo.skuNum * cartInfo.skuPrice }}</span>
            </li>
            <li class="cart-list-con7">
              <a
                href="#none"
                class="sindelet"
                @click="removeCartOneData(cartInfo.skuId)"
                >删除</a
              >
              <br />
              <a href="#none">移到收藏</a>
            </li>
          </ul>
        </div>
      </div>
      <div class="cart-tool">
        <div class="select-all">
          <label>
            <input class="chooseAll" type="checkbox" v-model="checkAll" />
            <span>全选</span>
          </label>
        </div>
        <div class="option">
          <a @click="removeAllChecked">删除选中的商品</a>
          <a href="#none">移到我的关注</a>
          <a href="#none">清除下柜商品</a>
        </div>
        <div class="money-box">
          <div class="chosed">
            已选择 <span>{{ commodities }}</span
            >件商品
          </div>
          <div class="sumprice">
            <em>总价（不含运费） ：</em>
            <i class="summoney">{{ commoditiesPrice }}</i>
          </div>
          <div class="sumbtn">
            <router-link to="/trade" class="sum-btn">结算</router-link>
          </div>
        </div>
      </div>
    </div>
    <Dialog :isShow.sync="isShow" v-show="isShow">
      <template #header>
        <p>提示</p>
      </template>
      <p>
        您确定要删除{{ isDelOne ? "该" : "所有选中" }}商品吗，此操作不可撤回！
      </p>
      <template #footer>
        <button @click="isShow = false">取消</button>
        <button @click="deleteCartData">确定</button>
      </template>
    </Dialog>
  </div>
</template>

<script>
import Dialog from "@/components/Dialog";
import { skuNumReg } from "@/utils/reg";
import {
  getCartData,
  updateCartData,
  removeCartData,
  removeAllCartData,
  addOrUpdateCart,
} from "@/api";

export default {
  name: "ShopCart",
  data() {
    return {
      shopCartList: [],
      isShow: false,
      skuId: "",
      isDelOne: true,
      skuIdList: [],
      shopCartListFilter: [],
    };
  },
  components: {
    Dialog,
  },
  async mounted() {
    const result = await getCartData();
    if (result.code === 200) {
      this.shopCartList = result.data[0] ? result.data[0].cartInfoList : [];
    } else {
      console.log(result.message);
    }
  },
  methods: {
    async updateCart(cartInfo) {
      let { skuId, isChecked } = cartInfo;
      isChecked = isChecked ? 0 : 1;
      const result = await updateCartData(skuId, isChecked);
      if (result.code === 200) {
        cartInfo.isChecked = isChecked;
      } else {
        console.log(result.message);
      }
    },
    removeCartOneData(skuId) {
      this.isDelOne = true;
      this.isShow = true;
      this.skuId = skuId;
    },
    async deleteCartData() {
      if (this.isDelOne) {
        const result = await removeCartData(this.skuId);
        if (result.code === 200) {
          this.isShow = false;
          this.shopCartList = this.shopCartList.filter(
            (cartInfo) => cartInfo.skuId !== this.skuId
          );
        } else {
          console.log(result.message);
        }
        return;
      }
      const allResult = await removeAllCartData({
        data: this.skuIdList,
      });
      if (allResult.code === 200) {
        this.isShow = false;
        this.shopCartList = this.shopCartListFilter;
      } else {
        console.log(allResult.message);
      }
    },
    removeAllChecked() {
      this.isDelOne = false;
      this.isShow = true;
      this.shopCartListFilter = this.shopCartList.filter((cartInfo) => {
        if (cartInfo.isChecked) this.skuIdList.push(cartInfo.skuId);
        return !cartInfo.isChecked;
      });
    },
    commodityNum(type, cartInfo, e) {
      let { skuId, skuNum } = cartInfo;
      let num;
      if (type === "add") {
        if (skuNum > 199) return;
        cartInfo.skuNum++;
        num = 1;
      } else if (type === "remove") {
        if (skuNum < 2) return;
        num = -1;
        cartInfo.skuNum--;
      } else {
        let newSkuid = e.target.value;
        if (skuNumReg.test(newSkuid)) {
          if (newSkuid > 200) {
            num = 200 - cartInfo.skuNum;
            cartInfo.skuNum = 200;
          } else {
            num = newSkuid - cartInfo.skuNum;
            cartInfo.skuNum = newSkuid;
          }
        } else {
          num = cartInfo.skuNum - 1;
          cartInfo.skuNum = 1;
        }
      }
      if (!num) return;
      addOrUpdateCart(skuId, num);
    },
  },
  computed: {
    checkAll: {
      get() {
        return this.shopCartList.every((cartInfo) => cartInfo.isChecked);
      },
      set(val) {
        this.shopCartList.forEach((cartInfo) => {
          cartInfo.isChecked = val ? 1 : 0;
          this.updateCart({
            skuId: cartInfo.skuId,
            isChecked: val ? 0 : 1,
          });
        });
      },
    },
    commodities() {
      return this.shopCartList.reduce((prev, current) => {
        return prev + current.isChecked;
      }, 0);
    },
    commoditiesPrice() {
      return this.shopCartList.reduce((prev, current) => {
        return prev + current.cartPrice * current.skuNum * current.isChecked;
      }, 0);
    },
  },
  watch: {
    isShow: {
      immediate: true,
      handler() {
        const dom = document.documentElement;
        this.isShow
          ? (dom.style.overflow = "hidden")
          : (dom.style.overflow = "auto");
      },
    },
  },
};
</script>

<style lang='less' scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 24%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 15%;
        }

        .cart-list-con2 {
          width: 35%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con4 {
          width: 9%;
        }

        .cart-list-con5 {
          width: 16%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 12%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>